Means for the cooling of compressors of the piston type



May 20, 1930- I A. HUGUENIN l1,759,748

MEANS FOR THE COOLING 0F GOMPRESSORS 0F THE PISTON TYPE Filed Sept. 18,1928 famed May 20,1930 7 1,759,748

y OFFICE) L- y Atnrinfrirueunivm; or rams, FRANCE i ,MEANSl 'nonyoooLIYNG or ooivrrnnssons oFiTHniPIsTon TYPE l p l A inppiicatiofnilaseptember, 17's, 4leze. seriai ivo.Y 396,762. i p y 1 The presentinvention 'relates "to the use lpfbetwee'n'the slide valvev f and thecylindrical of the method specified in the prior applicaf sleeve Z. yByYmeans "ofthe said lsleeve and ltionNo'. 135,460, led Sept.i14,k1926'.lthe cover m, the valvel seat d is securelyy Forthe same generalpurposeof reducing held in its recess. The hot gas clischarged`V 5 .heIclearance to a minimumand of reducby the cylinder escapes through thespace n; 55` ,n v ing the space employed for the mingling of av and thecoldA gas yissuing from vthe rintermecertain quantity oiihoty gas withthe' coldgas diate cooling element circulates through the which islsuppliedto the cylinder by the back space 0 into'the interiory or' thecylindrical -l 1 Y expansion, the device covered by the presentkvslidefvalve'f. v f, v j 10 invention may be.furtherimproved'v as here-The same letters indicate corresponding`r 60v Ainatter specifiedl j fparts in Figure 2, which also shows theshaft Byway of examplefthe poppetvalveand 79 Controlling the saidrvalve; it being inthe Y thev slidevalve arecontrolledby mechanicalrv vertical position, and also the camsg14 'g2 Q3 means of such nature as to provide for a long which, are heldby axial grooves 1" by means lstroke of the two' valves whilemaintaining of thenut s engaging thread t. The three65 the principleconsisting inthe use upon the cams g? g2 g? (Figure 6) act-as will befurl` compressor cylindery of. a single dischargether describeduponitwolevers u' and v valve as is at present employed in the knorwhich actrespectivelyupon the hollowsteni i mal construction. f of the slidevalve f and the stemV of vthe 20 The appendeddrawing shows way of fpoppet valve b Iby means of the journals w'f- 7.*0

25 mediate cooling chamber.

example a. formv of construction jcomprising and y and the pivotingspindles z and el. The av discharge valve combined with a slide valvellevers u1 and o carry the respective tenons used for the re-admissionof the cold gas aland a2 which are ycurvedconcentrically with. which hasbeen circulated through the inter-f the axis bl of the stationaryshaft@1 yabout Fig. l is a vertical section of the general -,saidtenonsalfand azthuscl'ose,v in fall their i. y

d* device consisting'of the horizontal valves, asv positions, theslots?1 providediri the vertical employed for compressor cylinder havinga. hollow 'track el. Itsinner space is illedwith vertical axis. oil, of'which onlyfaevery small part can es-l 30 Fig.2 is a horizontal sectionof the same. cape, since 'the telllOns a1 and a2 almost en-SO; 7

Fig. 3 is a vdetail of the shaftjcontrolling tirely close the 'only'apertures 'd1 formed in A theltwo valves. f j the cylinder el.V The oilcan be constantly're-v Fig. tshows the pressure-volumeieurve diav newedAin thecylinder e1 Vby a small pump n (not A gram of thecylinderuponwhich are repre- "-s'hown).f y

sented the points of'motion ofthe said valves. r The', vdeviceconsistingfo'f the? discharge'is5 ishows the characteristic positions ofv valve and the gas-changing'slide-valve is op'- 'f V.the two valves. i,.erated'as follows@v Y f 'j Fig.v6 shows the corresponding cams. v Thecontrolling shaft protates at the same I H a is the interiorfof thecompression cylinspeed as the crankshaftrof the eornpre'ssorffinfi, e0.'der with vertical axis I) is the. poppet dis-:'"t'he direction of' thearrow, Figure 2.V "ThefQOV charge valvel withrtapered iseat, providedcams q1 gf-act by the tenons1 upon `the leverwithlitsstem ending in thedash-pot 'c5 said it and Vup'onithe slide-valve f1; and the cams Vff! ivalve being applied upon its-seat 0l by thefg1 and gactbythetenon'o'upon'the'lever o;

spring The slide va'lve f carries atitsexf and hence upon the valve 5.@:The 1cam'g1"c'on-- 45 tendedjendthe dash-'pot gand is held uponft'rolsVthe Vsimultaneousl lift'of the two valvesfg' i; the same seat d bythevspringh;.thepaeking` v'and'it acts'at thepoint f1 ofthe curve(Figure i .p ring mounted on the cylindricalpart of vthe141),'9whichgivesthe position shownat fin. l

valve b affords tightness for the annularjoint .FigureA 5.;y @i .1

i between these two'valvesfwhilstthe packing;` :Thetcam'gzreleases'atthe dead: centreg'fini i i i" Y* f v.50 rings ckvoller tightness vforthe-(annular joint lanadjuillable manner,theslide valve which "100" Ifis 1 fexpansionfofithe cold 'rgzi-swc'ommenees in the; -y "c'ylinder,and alsothe strong cooling which 'gresillts rpirrthewrfsaine."V4 fi'sthus closed under thectionof the-spring l 5. The space @for theescape' of thehot ges 5 f will thus he close'dQand'thecoldlgas from owill have free'eccess tothe cylinder during l` the return'stroke ofthepis t'on.f'The device* Y The camsrele'asing the two .velves may :be Y1'; gdre'gulated zit'v Vwill upon'v the. grooves @so that Tlv/caninthe'firstg'place ndjnstlatthe exec-tf1 time desired,y thefclosivng ofthevr het gas and c the re-edmission ofthe cold"gas,andonthe other handVI can adjust the amountrof this `;refedmission `o/the cold ges.vTherdevice Voperates with? e simple mechinismv and a is sogrraingedthtthis ,coldigas will enter` the cylinder withV .the minimumllesstofV pres- At therpoint 7a? of' theJc-u'rve (.Figurel 4) V'jthisre-admissionv of cold Vgets is terminated bythe Yrapid-'closing ofthe valvebbythe spring e5 the adjustable Vcem g?. lhavingyjre; Y lleasedthe tenori a2 Vfromthe' Vlever if.' The -min-imum friction,4 and"provides Vfor long n i VKassured;1.VA l iffThe means i combinationio Y K5V Y strokes' of both'4 valves withi'; y consequentv Ymarked reductionof the lossof pressureoff the gas when ypassing throughthe seid valves.

also co-ecting with said seet,` esleeve inwhich the Said siideviiveiS-s1idab1e-, packing-rings vdisposed between the saidpoppetvalve andsaid -s1idefve1ve, and also between thesaid slide valve and thesa-idlsleeveQand Ineens"V for* the simultaneous control 01E-the [saidpoppet f valveand sli-idefvalve (for opening'purposes, 1j' Y and' for-thejs'eperate controlof saidvalvesfor closing .purposes..-v

seat inc-.the wall of said Cylindeigv a poppetk discharge'zvalvefco-actingk with-said seatysffsoi 4slide-valve@concentric,with saidlpdppetivalve 5 ind diseno-'acting with-saidseat,aJ sleeve vLinwhich-fthe said uslide"valve is sl-id'ahle,` f"

peckingv 'rings i disposedbetween the lsaid pOppeft valve" and said.vslide'v vel-ve, and VYalso between ,theV seid slide'valveend thefsa'd.fr vsleeve,two pivoted armspivotedfor the rfef `j spectiveontrolfof thesaid poppet ,v elvefemi v siide valve, and. twfcams cofecting respec-zVf' f have -Zhereunto fp Y tively with'thesaidrmsg; In' testimony pwhereof A' aiie'd inysignatlire.

- nu@ to. theme; eimthesiipping; ofthe,

Y tenons@1 andagmu'pron the cams g1 g? g? takes K 1 phice'nnderv foilvso-fthzitrat thin iilmof voi'lislY interposed between thefrictionpertsof-these Y two elements,1 the device provides aminimnm 'YY.

` rr rloss `of enel-'gyoccasioned by this inevitable` v,

Vfrictionn/ Y l 4': f* l jf The combination, covered byr the. present 1l j. invention,ofjthe poppetY-discharge Valve and 4a c which valves restVupona commonsseet(l,ref;1,A VV c dimes to;f a 1minimum the "space inwhich f K Y thefhot g'fgt'syndthe coldv ges mavminglej..

' V etgthe timeof-the readmission offthe cold; 1; gesvvhereby-themaximnmeicieney oftheV Y i 1 vmethodspecified!iin theprior patentlwillbe thejslidevalve Vfor the changing of the'A gegV iymple; andothrmeasfbrthe saffieieurpos L 34111@ compressor' ofthe piston type; the I -ALBERTjY

